I'm using a 23" LG monitor. The only sound that I'm using is off the motherboard which I don't have now. I'm hoping your fix will help me.

Hey guys...

Can this "Black Screen Issue" be described as:
- Sudden Black screen and in a few seconds PC automatically reboots at Post Sequence....no BSOD....

Very frustrating for me as I recently:
1. flashed my 759 Classy to 74 BIOS
2. swapped out my 920 for a 980X
3. swapped out my HX 1kw for a AX 1.2 kw

everything went fine...was running Driver 257.15, so clean install of 258.96...

Of course OC'ing / Bench Testing (P95)..get everything stable..then "bam"..Black screen and reboot to Post Screen (no reset required)....frustrating...

Try Driver 260.xx, select only graphics Driver and PhysX...clean install....same thing!

so I now have tried your suggestion above, disable corresponding HD audio Device and it no longer appears under "audio / sound" in Device Manager.....hope this does the trick, as if this indeed is causing the Black Screen issue, it should now be solved, if not....yikes..all kinds of troubleshooting.
Also, I had 8 nvidia HD audio devices show up in Device Manager....

btw.....never saw this Black Screen before with my HX 1 kW, 920 C1 at 3.8 Ghz and GPU Driver 257.15

^^^ Thanks..with nvhd audio disabled I'll continue to monitor....

btw...of course I read the entire Thread...it only mentions black Screen then having to "Hard / Soft Reboot" to solve....or nv display driver has stopped and now recovered....

My symptom is a little different..Black Screen and automatically reboots from the Post Screen....any tid bit of info I get helps me to eliminate potential issues after all the changes I made:
1. Is my 980X OC stable
2. Is my new AX PSU ok
3. Are my GPU's alright

etc etc etc....if indeed my Black Screen reset to Post is also a common Black Screen sequence, then I can suspect it is indeed something to do with the new GPU Drivers....

It didn't fix my black screen problems either.  I RMA'd my card a week ago and have been using my GTX 260 since then with the same drivers and have had no black screens at all. 

they must of read this thread over at nvidia the new betta drivers have options to not install hd drivers plus no need for driver cleaner programes they built one in.

@jazzy388
what card are you using?

try reseating your card

@milenam
did you uninstall your nvidia surround drivers?
 

Well I bought the 470 GTX and had to RMA b/c of the lockup on login.  Now I have the new card, and it seems to lock up randomly exactly as described: random black screen while doing normal stuff ex. browsing web, listening to music etc.  Works fine in games and I've even stress tested it.  Dissabled the the nvidia audio drivers like you said, we'll see how that goes.  I have to say I'm REALLY disappointed in Nvidia.  This was an upgrade computer build, in the old one I had a geforce 9600gt and never had a single problem.  The 470 has been nothing by trouble... 
 
Question though: there a a lot of devices on the IRQ 16 including the USB hub controller and this reminded me that ocasionally, not once a week max, my wired logictech mouse will lockup and not work when coming out of sleep mode.  Unplugging it and replugging it in fixes the problem: could this be related?  
Also, is there a way to change the IRQ?
Thanks!

I can disable the nv HD Audio Drivers, but even after a clean install of the latet Beta 260 Drivers I still have 8 friggin nv Audio Devices listed in my Device Manager....although they're now disabled....but..really..I like a "clean" system!
 
How the heck do I permanently trash these out of my Device Manager? Is their a link somewhere to Driver Cleaner that is mentioned...I do have Driver Sweeper....

^^^ Yes under Device Manager I already disabled the 2 (under System Devices) that correspond to my 2 x 480's....therefor under Sound I now only have my Realtek HD Audio showing up.....did all that fine.after installing the WHQL 258.xx. BUT...I'll repeat the question...
When I did a clean install of the new Beta 260 Driver, selected NO Audio HD or 3D Drivers "clean install"....Driver Sweeper F8 yada yada yada yada.....I still have the 8 nv HD Audio Drivers appearing in my Device Manager under Sound....then have to go back to System Devices and disable again.......am I always now going to have these 8 copiesof nv HD Audio devices showing up under Sound and ha to go through thiis procedure everytime I install a new Driver package..?
I thought the clean install of Beta 260.xx would get rid of this garbage from my system?
 
Looks like a clean install of Windows is going to be the only way to get rid of these 8 devices permanently?
 
Was also looking for a link to what you refer to as Driver Cleaner...cannot seem to find a "free download" anywhere...
 
thanks

@rjbarker
a clean install will not fix that issue.. you will probably have to do it every time you change drivers cause it rerecognizes the hardware when you install new drivers cause it wll see it as a new device

this is for any card that has an onboard sound device for output.
usually any card with HDMI has its on onboard sound device

@[link=showprofile.aspx?memid=457012]dunkinkid22[/link]
I followed your instruction in disabling the NVIDIA HD audio device.  However, whenever I use any 3D apps that utilize SLI such as Furmark (multi-GPU) or Bad Company 2, the screen would go black and system crashes as soon as the app starts using SLI.  I tried Furmark (single GPU) with SLI enabled and no problem.  Tried both latest beta and official driver.  Individual card ran flawlessly by itself.  I honestly think this is an issue with the driver in SLI configuration.  Currently using 480GTXs in 2-way SLI.  I also had similar black screen crashes when using 460 GTXs in SLI although it's more random.

Yup I disabled both audio device.  As soon as I ran Furmark (multi-GPU), black screen crash happens.  Any other trick?